Constantine I AE Follis. 321-323 AD.
RIC VII Trier 423. Of the highest rarity (R5).
CONSTAN-TINVS AVG
laureate bust right, wearing trabea, holding eagle-tipped sceptre
BEATA TRAN-QVILLITAS
globe on altar inscribed VO TIS XX, three stars above.
Mintmark PTR crescent.
http://www.wildwinds.com/coins/ric/c...IC_vII_423.jpg